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Proceedings Paper

Design of compact zoom system for 3-to-5-um waveband thermal imager
Author(s): Ming-Wen Chang; Shin-Guo Shiue; Fu-Ming Chuang
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Paper Abstract

A 3-5 µm zoom lens system is designed with four moving components. Even though the optical system is designed to provide high resolution throughout the 4:1 zoom range, it is still compact. A special optimization method is used for finding the cam solution of the zoom lens . The polynomial equations from the optimization method are used for fitting zoom run during the optimization process. This method can minimize the cam sensitivity at the start of the first order design. The concept to achieve aberration balance is described. The detail design was accomplished through the use of a computer optimization program. A cam modification procedure is used to compensate the image shift after the final design. The one mrad image resolution requirement is achieved throughout the zoom range.

Paper Details

Date Published: 25 September 1997
PDF: 12 pages
Proc. SPIE 3129, Zoom Lenses II, (25 September 1997); doi: 10.1117/12.284236
Show Author Affiliations
Ming-Wen Chang, Yuan Ze Univ. (Taiwan)
Shin-Guo Shiue, Industrial Technology Research Institute (Taiwan)
Fu-Ming Chuang, Industrial Technology Research Institute (Taiwan)

Published in SPIE Proceedings Vol. 3129:
Zoom Lenses II
Ellis I. Betensky; Allen Mann; Iain A. Neil, Editor(s)

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